Shouguang is the hometown of Jia Sixie, the author of the world's first agricultural masterpiece "Essentials for Elevating the People". It is the birthplace of the country's winter-heated vegetable greenhouses and the largest vegetable production base in China. (1) Shouguang is the “experimental field” for greenhouse vegetables in the country, with a wide variety of vegetables. In recent years, *** has introduced more than 2,000 new varieties of *** from more than 30 countries and regions including the United States, the Netherlands, and Israel, 1,500 of which have been eliminated through trials, and 500 new varieties have been grown in farmers' greenhouses. gold. (2) Shouguang Vegetables started the second revolution in the vegetable industry with the development of green food vegetables as the main content. Focusing on improving the quality of vegetables, we focused on the construction of pollution-free vegetable bases, focused on strengthening pollution-free vegetable production monitoring in all aspects before, during and after production, and built vegetable high-tech demonstration gardens, Wenjia, Sanyuanzhu, There are five major pollution-free vegetable bases such as Diaoyutai and Luocheng. The city's pollution-free vegetables have grown to 200,000 acres. There are 20 types and more than 100 varieties that have passed the certification of the National Green Food Development Center and obtained green food certificates. (3) Shouguang vegetables have outstanding brand effect. Promote standardized management measures, strengthen quality control, carry out vegetable base identification, product certification and trademark registration, promoting the upgrading of Shouguang vegetable production. Large areas of land are structurally adjusted according to the same standards, creating the "green brand" of Shouguang vegetables. "Ecological brand" has created Shouguang's "branded vegetables". (4) Shouguang has a large scale of vegetable cultivation. Shouguang City has a vegetable planting area of ??700,000 acres, with a total output of 3 billion kilograms. There are currently 200,000 winter-heated greenhouses and 50,000 arched sheds. About two-thirds of the area of ??the winter warm-type greenhouse is used for two crops a year, that is, planting autumn extension stubble and early spring stubble, and one-third of the greenhouse is used for one crop a year, that is, planting overwintering stubble. The autumn stubble of greenhouses is generally sown or planted around the beginning of autumn and planted around New Year's Day. Early spring seedlings in greenhouses are generally raised around New Year's Day. For crops with a long seedling period, several rows of previous crops need to be removed to raise seedlings in advance. They are usually planted in February and removed from May to June. Greenhouse vegetables are mostly used in late autumn and early spring to plant multiple crops of fast lettuce or vegetables with a short growth period.